Evaluating Expressions through

Lesson Outline

PEMDAS Graphic Organizer

Evaluating Expressions

Let’s dive into the order of operations, utilizing

PEMDAS to grasp the evaluation of expressions

involving multiple operations.

Introduction

With a nifty graphic organizer, we can independently practice problem-solving, strengthening our understanding of this fundamental mathematical concept.

Evaluating Expressions

We use the order of operations to understand and remember how to evaluate expressions involving two or more operations.

PEMDAS is a common acronym

that can help us remember the order:

We use the order of operations to understand and remember how to evaluate expressions involving two or more operations.

Then we add and subtract from left to right.

aⁿ exponents

× multiply

() parentheses or grouping symbols

÷ divide

+ add

− subtract

Work on the example on the next slides

Let’s Practice!

4³ = 4 × 4 × 4 = 64

4³ − 36 ÷ 6 + 2 (9 + 12)

9 + 12 = 21

4³ − 36 ÷ 6 + 2 × 21

Let's evaluate this expression!

64 − 36 ÷ 6 + 2 × 21

From left to right, we first divide and then we multiply.

64 − 6 + 2 × 21

2 x 21 = 42

From left to right, we subtract first, and lastly, we add.

64 − 6 + 42

64 - 6 = 58

58 + 42

100

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